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    <script type="text/javascript" src="./lesson_2.js"></script>
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    <title>Document</title>
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<body>
    <!-- <script>
        var num1 = prompt("num1 = ");
        var num2 = prompt("num2 = ");
        switch(num1 < num2)
        {
            case true:
                console.log("num1大");
                break;
            case false:
                console.log("num2大");
                break;
            default:
                console.log("一样大");
                break;
            
        }
    </script> -->
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